I am planning to use a STUSB4710 and use the reference schematic from it's datasheet (Figure 7). There is a connection between the STUSB4710 with the ST1S14's feedback pin. Is this how they communicate with each other to get for example 20V or 15V on...

I want to use a STUSB4500LBJR for USB-C power delivery. On the datasheet stands that connecting the I2C lines is optional and in another datasheed of the STUSB4500 stands that I don't have to use a microcontroller. But I cannot find information about...